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Thread: O2 Sensor Problem w/ Dynatechs Installed

  1. 07-30-2004 03:47 PM #1
    bonedog
    bonedog is offline Junior Member
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    Ok I think this is where I should post this...

    I have the Dynatech Headers on my AV and keep blowing my rear O2's... I have gone through 6 in 2 months now. I put a new one in.. reset the PCM with the Superchips and within a week or 2 I get the SES light again and pull up code P0157- low voltage sensor 2 bank 2. What gives?? I have replaced them even tried the O2 sims and the sims cause 3 diffrent codes.. P0153,P0155,P0159

    Can anyone steer me in the right direction?? I am sick of that SES light and now my A/F guage bounces wildly from rich to lean and I am almost ready to take it out because of how anoying it is. Please help me...

    Bonedog
    03 Arrival Blue Avalanche

    5.3 w/ Volant Cold air, K&N Intake Tube, Dynatech Long Tubes, High Flow Cats, 3" Exaust, Flowmaster 40, Belltech 2/3" Drop, Hotchkis Front and Rear Bars, SP Performance Dimmond Drilled & Slotted Rotors, Hawk HPS Pads, American Racing Terons wrapped in Nitto NT-404 295/50/20's, Pioneer AVIC-N1, Alpine MDF-500s, 4 JL 10W6v2's

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  2. 07-30-2004 04:19 PM #2
    rckrzy1
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    Originally posted by bonedog@Jul 30 2004, 01:47 PM
    Ok I think this is where I should post this...

    I have the Dynatech Headers on my AV and keep blowing my rear O2's... I have gone through 6 in 2 months now. I put a new one in.. reset the PCM with the Superchips and within a week or 2 I get the SES light again and pull up code P0157- low voltage sensor 2 bank 2. What gives?? I have replaced them even tried the O2 sims and the sims cause 3 diffrent codes.. P0153,P0155,P0159

    Can anyone steer me in the right direction?? I am sick of that SES light and now my A/F guage bounces wildly from rich to lean and I am almost ready to take it out because of how anoying it is. Please help me...

    Bonedog
    My A/F guage always goes back and fourth, that's normal. Are
    you sure the O2 are going bad ? Is your a/f hooked to that sensor?
    mostly stock 04 silverado 1500 CC
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  3. 07-30-2004 04:23 PM #3
    bonedog
    bonedog is offline Junior Member
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    The SES light comes on and when i scan the code I get P0157. I replace the sensor and a few weeks later BAM 157 again.. I am sure its the sensor.. I even took it to the dealer(BIG Mistake) and had the guy check it with a Tech2 and he replaced the O2 according to what the TechII told him..

    No the A/f gauge is conected to the front O2 before the cat on the passengerside
    03 Arrival Blue Avalanche

    5.3 w/ Volant Cold air, K&N Intake Tube, Dynatech Long Tubes, High Flow Cats, 3" Exaust, Flowmaster 40, Belltech 2/3" Drop, Hotchkis Front and Rear Bars, SP Performance Dimmond Drilled & Slotted Rotors, Hawk HPS Pads, American Racing Terons wrapped in Nitto NT-404 295/50/20's, Pioneer AVIC-N1, Alpine MDF-500s, 4 JL 10W6v2's

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  4. 07-31-2004 01:31 AM #4
    Mn Avalanche
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    Get a nelson tune, and have him delete the rear 02 sensors.
    2003 Z71 Avalanche----93 tune by Nelson- Pro cold air induction-Azsm long tube headers-Magnaflow catback-Trans go shift kit-B&M tranny cooler-160 t stat
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  5. 07-31-2004 03:39 AM #5
    Hit Man X
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    You sure a cat isn't bad...
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  6. 07-31-2004 09:32 AM #6
    8budfan
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    my wifes truck was doin that .the truck only has 16,000 miles on it and it was a bad cat..they had the damn truck and her in a rental for a week..changed the cat and whatever else they did the truck runs way better than it ever has.
    admin please delete this acct....
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  7. 08-02-2004 12:37 PM #7
    bonedog
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    I don't think it would be the cat... The headers came with two brand new cats. This code came on like 2 or 3 days after the header install. Could they have sent me a bad cat??
    03 Arrival Blue Avalanche

    5.3 w/ Volant Cold air, K&N Intake Tube, Dynatech Long Tubes, High Flow Cats, 3" Exaust, Flowmaster 40, Belltech 2/3" Drop, Hotchkis Front and Rear Bars, SP Performance Dimmond Drilled & Slotted Rotors, Hawk HPS Pads, American Racing Terons wrapped in Nitto NT-404 295/50/20's, Pioneer AVIC-N1, Alpine MDF-500s, 4 JL 10W6v2's

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  8. 08-02-2004 04:10 PM #8
    8budfan
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    ah dude...did you get that dynatech supermaxx long tube header system complete...i've been looking at that system and it looks great for 1199.00
    admin please delete this acct....
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  9. 08-02-2004 04:15 PM #9
    bonedog
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    yea it was the complete system.. headers, cats, Y-pipe and everything else that comes with it..gaskets/clamps/wires/nuts/bolts...


    I just can't figure this out... Guess i will have who ever I go with for a PCM upgrade just shut the rears off so I don't have that stupid light.
    03 Arrival Blue Avalanche

    5.3 w/ Volant Cold air, K&N Intake Tube, Dynatech Long Tubes, High Flow Cats, 3" Exaust, Flowmaster 40, Belltech 2/3" Drop, Hotchkis Front and Rear Bars, SP Performance Dimmond Drilled & Slotted Rotors, Hawk HPS Pads, American Racing Terons wrapped in Nitto NT-404 295/50/20's, Pioneer AVIC-N1, Alpine MDF-500s, 4 JL 10W6v2's

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  10. 08-02-2004 04:26 PM #10
    8budfan
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    yea...that will prolly be your best bet...what did you put on the end of the system and how does it sound...what about hp and torque...any difference....
    admin please delete this acct....
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